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@deepracticex/conversation-storage

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@deepracticex/conversation-storage

DeeChat 对话存储管理包 - 纯存储层实现,支持统一数据库文件的表管理模式

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@deepracticex/conversation-storage

DeeChat 对话存储管理包 - 纯存储层实现

设计原则

职责边界

  • 数据存储和检索 - 会话和消息的CRUD操作
  • 数据库管理 - SQLite数据库初始化和迁移
  • 类型定义 - 存储相关的TypeScript类型
  • 业务逻辑 - 由 ConversationDomain 负责
  • AI集成 - 由 ConversationDomain 负责
  • 流式处理 - 由 ConversationDomain 负责

架构分层

ConversationDomain (业务层)
       ↓ 依赖注入
conversation-storage (存储层)
       ↓ 持久化
SQLite 数据库

核心实体

ConversationSession (会话)

interface ConversationSession {
  id: string                 // 会话ID
  title: string             // 会话标题
  ai_config_name: string    // 关联的AI配置名称
  created_at: string        // 创建时间
  updated_at: string        // 更新时间
  message_count: number     // 消息数量
}

ConversationMessage (消息)

interface ConversationMessage {
  id: string                 // 消息ID
  session_id: string        // 所属会话ID
  role: 'user' | 'assistant' | 'system'  // 角色
  content: string           // 消息内容
  timestamp: string         // 时间戳
  token_usage?: TokenUsage  // Token使用情况(可选)
}

API 设计

会话管理

  • createSession(data: CreateSessionData): Promise<ConversationSession>
  • getSession(sessionId: string): Promise<ConversationSession | null>
  • getSessions(): Promise<ConversationSession[]>
  • updateSession(sessionId: string, updates: Partial<SessionData>): Promise<void>
  • deleteSession(sessionId: string): Promise<void>

消息管理

  • saveMessage(data: CreateMessageData): Promise<ConversationMessage>
  • getMessageHistory(sessionId: string): Promise<ConversationMessage[]>
  • deleteMessagesBySession(sessionId: string): Promise<void>
  • updateMessageCount(sessionId: string): Promise<void>

数据库设计

sessions 表

CREATE TABLE sessions (
  id TEXT PRIMARY KEY,
  title TEXT NOT NULL,
  ai_config_name TEXT NOT NULL,
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL,
  message_count INTEGER DEFAULT 0
);

messages 表

CREATE TABLE messages (
  id TEXT PRIMARY KEY,
  session_id TEXT NOT NULL,
  role TEXT NOT NULL CHECK(role IN ('user', 'assistant', 'system')),
  content TEXT NOT NULL,
  timestamp TEXT NOT NULL,
  token_usage TEXT, -- JSON格式存储
  FOREIGN KEY (session_id) REFERENCES sessions(id) ON DELETE CASCADE
);

索引设计

CREATE INDEX idx_messages_session_id ON messages(session_id);
CREATE INDEX idx_messages_timestamp ON messages(timestamp);
CREATE INDEX idx_sessions_updated_at ON sessions(updated_at);

集成方式

ConversationDomain 中的使用

export class ConversationDomain implements IDomain {
  private conversationStorage: ConversationStorage
  
  constructor(
    private aiConfigDomain: AIConfigurationDomain,
    conversationStorage: ConversationStorage
  ) {
    this.conversationStorage = conversationStorage
  }
  
  async createSession(input: CreateSessionInput): Promise<ConversationSession> {
    // 业务逻辑验证
    const aiConfig = await this.aiConfigDomain.getUserConfiguration(input.ai_config_name)
    if (!aiConfig) {
      throw new Error(`AI配置 '${input.ai_config_name}' 不存在`)
    }
    
    // 调用存储层
    return await this.conversationStorage.createSession({
      title: input.title || `对话 ${new Date().toLocaleString()}`,
      ai_config_name: input.ai_config_name
    })
  }
}

参考设计

参照 @deepracticex/ai-config 包的设计模式:

  • 简洁的API设计
  • 统一的错误处理
  • 遵循"如非必要,勿增实体"原则
  • 纯粹的存储职责

开发计划

  • Phase 1: 基础包结构和类型定义
  • Phase 2: SQLite存储实现
  • Phase 3: 集成到ConversationDomain
  • Phase 4: 测试和优化

Keywords

conversation

FAQs

Package last updated on 30 Sep 2025

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